Vacuum pump and compressor for milking machines



2 Y 1643,296 Sept 1927- J. P. DEVINE I VACUUM PUMP AND COMPRESSOR FOR MILKING. MACHINES Qriginal Filed Oct. 5. 1921 4 Sheets-Sheet 1 2s. Humanit JOSEPH F Dav/NE Sept. 27', 1927.

J. P. DEVINE VACUUM PUMP Am) COMFRESSOR FUR MILKING MACHINES original Filed on, 5, 1921 4 Sheets-Shget 2 FZDEV/NE;

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Patented Sept. 27, 1927.

UNITED STATES JOSEPH P. DEVINE, F BUFFALO, NEW YORK] I VACUUM PUMP AND coMPnEssoR ronMILK-rnG vmomnns. I A

Application filed 0ctober'3, 1921, Serial m,5 o4,a7'2 .1'aeaewed arms- 15, 1 927. i

This invention relates to vacuum pumps and compressors and one of the ob ects of the invention is to provide a machine adapted to operate a pulsating device such as is use of valves or other parts of mechanism requiring the use of oil or water is elim nated. I

7 Another object of the invention is to produce a new and improved machine of the above character, so constructed that it can be built in a series of stages, units or sections whereby'the apparatus may be adapted for. use to produce any desired degree of.

vacuum or pressure, thus eliminating the necessity of constructing different sized models and saving the incident expense of providing separate patterns for the production of different sized machines.

Another object of the invention is to. provide a neat, compact and economically constructed vacuum pump andcompressor. and combining therewith a pulsating device wherein all danger of foreign substances contacting with the 'milk or entering the milk passages or conduits is eliminated.

Other objects and aims of the invention, more or less specific than those referred to above, will be in part obvious and in part pointed out in the course of the following description of the elements, combinations,

arrangements of parts and applications of principles, constituting the invention; and the scope of protection contemplated will be indicated in the appended claims.

In the accompanying drawings wherein I have illustrated a preferred form of embodiment of my invention;

Figure lis a view in elevation partially in section showing my improved machine,

Figure 2 is a plan view of the apparatus shown in Figure 1,

Figure 3 is a sectional View taken online 3-3 of Figure 1, showing the pulsator when in position for what is known as the massaging operation, v

Figure at is a similar sectional view showing the pulsator when in the position for drawing milk from the udder of a cow,

Figure 5 is a vertical sectional View upon an enlarged scale showing the pumping apparatus and the manner -1n which, this part of the machine may be built up in sections, Figure 6 is a horizontalsectional view taken on line 6-6 of Figure 5 through the suction veins, of; the I impeller and diffusion irlngs, I I i .i

Figure 7 isa detailjview in elevationdf one of the impeller ri ngs,and employed in milking machines wherein the I difiiusion rings,

Figure 8 is asimilar view of one of the lubricating oil or other foreign substances coming in contact with the exhaust whereby the milk is contaminated or rendered unclean in its passage from the udder of the cow' to the receptacle. In my improved machine I have eliminated these and other disadvantages by providing an apparatus wherein the useo-f lubricating oil or water seals is entirely eliminated, as will be evident from thedescription of the said machine set forth here below.

Referring now to the drawings, the reference numerall indicates the base of the machine which is fitted to or forms the cover of the milk pail or container 2. Mounted upon the base l areithe walled sectionsB, forming the exterlor casing of the pump, said sections being joined and fitted together at'the points 4, all the sections being securely held together by the clamp bolts 5 which extend from the bottom of the casing to the top part or cap 6. Thisarrangernent of parts forms a jacket or casing for [what I term diffusion rings 7 and impeller rings 8 each section 3 having'an inwardly extending 1 portion or flange 9, which parts for purposes of this description may be referred to as intermediate diffusion rings. The sections 3 and the diffusion rings 7 are built up instages or layersbearing or resting upon one another by; means of the project-ions 10 and 11. The impeller rings 8 are built up in corresponding stages and each of said impeller rings 8'is provided with suction veins or passages 12 formed between the projections orraised. portions 13. and the walls 14. These suction vein s 12,when the impeller rings 8 are rotated, make connection with veins'or guideways 15 and 16 formed :be-

"tween the projections 10 and Hot the dittu-.

, Similar, referencecharacters refer to siinilar parts throughout the several viewsof the r sion rings 7. The impeller rings 8 are secured to a shaft 19 by the keys 20 and are so disposed upon each other that clearance is provided for their rotation between the diffusion rings 7 and 9, all the partslast described being concentrically positioned with reference to the shaft 19. The suction veins 12 of the impeller rings 8 and the veins o1? gui'deways 15 and 16 of the diffusion rings 7 are so disposed and related with reference to each" other that air pumped or projected forward by the veins. of one impeller is diffused or conductedby said veins or guidew -ys H and 16 to the next or neigh r g impeller, it being understood that the more imp ller an their associa ed dif u ion r g h g eater will e hevacuum produced and the higher will be the pressure.

An electric motor (not shown) but mounted in the housing 22, supplies the motive powerful the machine, said housing 22 be ng mounted upon a split cas1ng23 wh ch h uses h pul atiug e hani m pr sen y t be described. The bolts 6 securing this n per structure in a single unit to the uppermost section 3 of themachine, The electric motor (not shown) but which is mounted in thehousing 22 and for which may be substi- V tuted anv desirable source of motive power,

Ill

drives bymeans of the shaft 24; (driven by the motor), pulley 25; belt 26, pulleys 27 and 28, belt 29 and pulley 30 mounted upon a reduced portion 31 offthe shaft 19.

In the present instance the ratio of increased transmission is approximately 5 to 1, In the present nstance 1t is desired to drive the impeller rings at a veryhigh speed, that is to say, they are driven at high o gh s .eed produce he desir d a u m and boil up the desired pressure without the use of valves or water seals. 1 contemplate dri ing the mo r at a p ed o sever would result in driving the shaft 19 and the rate of speed, it having been determined that the desired results are best attained at a high r te. f ev ti n i The pu l y 30 ured y mean of a c amp 1m 2 p0n he ape e por ion. 3.3. f

the du ed p r ion fil f he haf 1.9 an

e impe r r gs are h l in p c upon. th s af 1 me s of th c amp nu ,4ia1 l co ar 3 f rmed e r h lower nd of th .shaft- 19. Bearings 36 and 37 composed of suitable bearing nietal are provided for the shaft 19.

Referring now to the pulsating mechanism illustrated in Figures 1 and 2, this mechanism comprises a plunger 40 provided with the'valves or ports 41 and 42, said plunger being slidable within a chamber 43 provided in the upper part ofthe split casing 23. This plunger is pivoted at 44 to astrap l5 and its eccentric 46, the latter being secured by producing a reciprocating movement of the plnnger 34through the driving transmission of the pinion 51 and" the planetary gear 50, This disposition of parts provides for the proper or des red reciprocation of ,the plungerlO, the present arrangement providing for pulsations of about 4:5 perminute which number of pulsations is considered about rightfor the intermittent messaging and suction produced uponthe teat of the cow.- l r l l l l Having thus described my invention, the

operation thereof, which from the foregoing should be largely obv1ous,ma' y now be understood, t a i, V l i In the use of my improilod apparatus the base or cover 1 thereof is mounted upon the milk pail or container 2iiIfCliGated by the dotted lines in Figure lyand suitable line connections are extended non] the side walled portionof the chamber or cylinder e3 as indicated by the dotted lines in Figures 2, 3 and 4, further connections (not shown) being made to the teat cups upon the udder of, the, cow, it'being unnecessary to show these parts inasmuchas the application of s m lar machines s Well known in the ,art. 'lhecover port on 1 may be provided with valves 5,5 and 56, which control the mill; flow intothe pail 2 from the hose connections 57 and leading from teat cups (not shown). When it is, desired to startthe milking on V oration the switch 59, controlling the leads thousand revolutions per minute which to the motor, is turnedon starting the motor 22 whereby the impeller rings are rotated at the high rate of speed hereinbefore described between the diffusion rings 7 and 9, the diguideways l5 and 16 are set at the desired angularitywith respect to the veins of the impeller to diffuse or conduct the air from one impeller to itsneighbor, the air being compressed atthe point of 'the exhaust outlet 6 1. 1

I have found 'itdesirable to maintain a )ressure of about three; (3) pounds at the exhaust outlet partial vacuum at the inlet port.

Referring now to Figures 3 and 4, the exhaust 61 and the vacuum inlet 60 have connections 63-and 64 respectively with the pulsating chamber or cylinder 43 which connections are adapted to communicate by means of the ports 41 and 42 of the plunger or piston with the connections 65 and 66, the latter being connected with the teat cups. The plunger. or piston in its reciprocating movement driven by the gear mechanism previously described, alternately connects and disconnects by means of the ports 41 and 42 the connections 63 and 64 with their corresponding connections or passageways 67 and 68. In Figure 4 of the drawings the port 12 is shown in communication with passageways 68 and 70, the latter port leading to the connection 64, whereby the ports are connected for the suction operation in the drawing of milk, the connection 64 providing the source of suction from the outlet 61 of the pump, the connection 66 leading to the inside of the teat cup (not shown).

In Figure 3 of the drawings the port 41 of the plunger is shown in communication with the passageways 67 and 68 for the com- I pression of the air to apply the necessary pressure required in massaging the teat of the cow and to relieve the suction, the connection 63 communicatingthe pressure from the pump and the hose connection 65 to the interior chamber of the teat cup (not shown). Port 71 provides for the discharge of the air pressure when the vacuum is employed for drawing the milk.

It will accordingly be seen that I have provided a machine well adapted among others to attain all the ends and objects above pointed out in a very simple and facile manner. By arranging the impeller and diffusion rings in the manner above described and relating the impeller and diffusion veins as shown in the drawings I am able to produce the desired amount of vacuum and pressure without the employ ment of valves or seals requiring the use of lubricating'oil and water, whereby the milking operation is rendered safer for the producer and the milk is kept in a cleaner and more wholesome condition for the consumer.

As many changes could be made in this construction without departing from the scope of the following claims, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative only and not in a limiting sense.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is: I p

1. In apparatus of the character described, the combination with a milk container, of

a rotary air pump having avacuum chamber and a compression chamber, teat cup connections in communication with the container, a pulsating device mounted upon the pump, a driving shaft, means for connecting the driving shaft and said pulsating device connections in communication with the container, the said pump having a central vertical shaft, a pulsating device mounted upon the pump and having a driving shaft aligned with the said pump shaft, means for connect ing the driving shaft and the pump shaft to operate the pump, and air-conducting connections whereby the. said pulsating device is in communication with the vacuum chamber and the compression chamber of the pump.

3. In apparatus of the character described, a milk container having a removable cover,

the said cover having teat cup connections,

an air pump mounted upon the said cover and having a vacuum chamber and a compression chamber, a pulsating device mounted upon the said pump, a motor mounted upon the said pulsating device and having a downwardly extending driving shaft, means for connecting the driving shaft and the pulsating device to operate the device, 7

means arranged between the said device and the pump for connecting the said driving shaft and pump to operate the pump, and air-conducting connections whereby said pulsating device is in communication with the vacuum chamber and the compression chamber of the pump.

In testimony whereof, I affix my signature.

JOSEPH P. DEVIN E. 

